121022112011221 has 16 divisors (see below), whose sum is σ = 125241755549040. Its totient is φ = 116805572674560.

The previous prime is 121022112011197. The next prime is 121022112011231. The reversal of 121022112011221 is 122110211220121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 70307973450225 + 50714138560996 = 8384985^2 + 7121386^2 .

It is a cyclic number.

It is not a de Polignac number, because 121022112011221 - 2⁵ = 121022112011189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022112011231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1225652365 + ... + 1225751101.

It is an arithmetic number, because the mean of its divisors is an integer number (7827609721815).

Almost surely, 2^{121022112011221} is an apocalyptic number.

It is an amenable number.

121022112011221 is a deficient number, since it is larger than the sum of its proper divisors (4219643537819).

121022112011221 is a wasteful number, since it uses less digits than its factorization.

121022112011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114024.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121022112011221 its reverse (122110211220121), we get a palindrome (243132323231342).

The spelling of 121022112011221 in words is "one hundred twenty-one trillion, twenty-two billion, one hundred twelve million, eleven thousand, two hundred twenty-one".